Which sound wave features are being described?

The number of wavelengths/time:

Distance traveled/time:

Answer;

Frequency-The number of wavelengths/time:

Speed - Distance traveled/time

Explanation; Frequency is the number of waves produced by a source per second, it is measured in hertz (Hz). Period is the time it takes for one complete oscillation, it is measured in seconds. Speed of a wave is the distance traveled by a wave per unit time, it measured in meters per second, m/s. The speed of a wave is related to its frequency and wavelength.

frequency then speed; )